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NLL test for mutating &mut references #47609

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merged 2 commits into from
Jan 25, 2018
Merged

NLL test for mutating &mut references #47609

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dbb6519
NLL test for mutating &mut references
ritiek Jan 20, 2018
06d123d
Remove similar test that does not run the result
ritiek Jan 23, 2018
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12 changes: 6 additions & 6 deletions ...ck/borrowck-nll-iterating-and-updating.rs → src/test/run-pass/nll/mutating_references.rs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
Expand All @@ -8,17 +8,14 @@
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// compile-flags: -Z borrowck=mir -Z nll

// This example comes from the NLL RFC.
#![feature(nll)]

struct List<T> {
value: T,
next: Option<Box<List<T>>>,
}

fn to_refs<T>(list: &mut List<T>) -> Vec<&mut T> {
let mut list = list;
fn to_refs<T>(mut list: &mut List<T>) -> Vec<&mut T> {
let mut result = vec![];
loop {
result.push(&mut list.value);
Expand All @@ -31,4 +28,7 @@ fn to_refs<T>(list: &mut List<T>) -> Vec<&mut T> {
}

fn main() {
let mut list = List { value: 1, next: None };
let vec = to_refs(&mut list);
assert_eq!(vec![&mut 1], vec);
}